Mounting for textile mill spindles



March 18, 1947.

H. GLEITZ ET AL MOUNTING FOR TEXTILE MILL SPINDLES Filed April 18, 1.945

LIGHT weacur METAL s ALUMINUM) 2 Sheets-Sheet l PA UL 965 964 965 Fag-1l N v ENTO Rs H E R BE RT GLE frz CHARLE s EJVIILLER I. 'FHvR E ENATTORNEY March 18, 1947. H n-z ET AL 2,417,485

MOUNTING FOR TEXTILE MILL SPINDLES Filed April 18, 1945 2 Sheets-Sheet 2lNVENToRs:

HERBER G LEITZ CHARLES E, MILLER Patented Mar. 18,1947

UNITED STATES PATENT OFFICE MOUNTING FOR TEXTILEMILL SPINDLESApplication April 18, 1945, Serial No. 589,010

9 Claims.

This invention relates to a spindle such as used in textile mills, asfor spinning or twisting.

Textile mill spindles have been very highly developed and recentimprovements made at the instance of the assignee hereof inanti-friction bolster bearing constructions and resiliently mountedfootstep bearings have permitted increases in loading, speed ofoperation, and life of the unit, Increased speeds and loading havedemanded improvements in brake design to provide adequate braking forceswithout complication of construction. Prior brake structures which haveprovided the necessary braking forces have not only been relativelyexpensive, but the operating mechanisms thereof have been subject tooccasional failures and have not been as positive in operation as isdesired. The cost of high speed spindles has been greatly reduced byforming the bolster case of seamless steel tubing and rigidly securing amain mounting and brake supporting flange thereto, However, further roomfor improvement was found to exist both in the manner of making suchflange and in the manner of attachment thereof to the bolster case.Reduction in the cost of the bolster case has caused the blade to assumea disproportionate share of the cost of the completed spindle, and needhas therefore arisen to simplify the method of blade manufacture as wellas to render the brake and its supporting structure less expensive whileat the same time improving as a Whole both the construction andoperation of the spindle assembly.

The present invention provides an improved textile mill spindle havingall of the advantages of present spindles, and particularly thosepossessed by the spindle construction described in United States PatentNo. 2,351,951, issued June 20, 1944, to Herbert Gleitz and in thecopending application of Herman H. Brooksieker and Paul I. Thyreen,filed June 21, 1944, as Serial No. 541,420. The invention also includesan improved bobbin or spool adapter which latter eliminates manydisadvantages heretofore considered inherent and which enables the useof a shorter and consequently less costly blade. The spindle of thepresent invention further comprises an improved and simplified internalbrake mechanism capable of exerting the maximum desired braking forcesquickly, although gradually, with great uniformity of bearing loading;an improved means for effecting braking force application and release;an improved manner of securing a bolster bearing in place; a novelmounting structure for the brake and the whorl hook, and certainimprovements relating to the footstep bearing.

The improvement in internal spindle brakes relates to the operatingmechanism including a manual control lever and mechanism disposedbetween the lever and a pair of outwardly expandable shoes whereby thebraking forces are uniformly distributed andmore quickly and positivelyreleased, and the entire mechanism rendered less subject to binding andrapid wear. A novel main mounting flange or collar, which also supportsthe brake (when used) and/or the whorl hook and driving band guide andusually an oiling fitting, is of a simplified construction which reducesmany of the machining and drilling operations required in themanufacture of spindle mounting flanges or collars and thus eliminatesthe need for several costly fixtures and makes possible more rapidmanufacture. The bobbin or spool adapter for the spindle hereindescribed is made of aluminum or metal of the same type as aluminuminstead of wood, as in conventional practice and not only possesses allof the advantages naturally to be expected from such change but alsopossesses many unexpected advantages which contribute to betteroperation as well as lower manufacturing and maintenance cost.

An object of this invention is to provide a spindle having the foregoingadvantages and features.

Another object is to provide an improved internal braking mechanism fortextile mill spindles which mechanism is economical in construction,wherein the braking force is uniformly distributed over the entire brakeshoe area and whereby brake application and release are made morecertain of rapid accomplishment.

A further object is to provide an improved collar or mounting flangeconstruction for a textile mill spindle.

Another object is to provide a composite collar or mounting flangeconstruction for a textile mill spindle in which complemental parts areformed by a simple punching and coining operation from sheet stock.

A still further object is to provide an improved bolster bearingconstruction in which rollers are used, and specifically a new manner ofsecuring the bearing assembly against dislocation and undesirabletampering.

A further object is to provide an improved footstep bearing and supportand centering means therefor in a bolstercase.

Other objects include the provision of a light metal adapter forcooperation with a spindle blade and bobbin, and the provision of asupport- Fig. 1a is an enlarged sectional view of a footstep centeringspring assembly with the spring in an abnormally unstressed condition;

Fig. 2 is a view illustrating two finished sections from which thespindle blade is formed by weldins;

Fig. 3 is a fragmentary view corresponding to the central portion ofFig. 1 showing a different (larger) type of spindle embodying the brakemechanism; t I

Fig. 4 is a cross sectional view taken generally at 4-4 on Fig. 3; y I

Fig. 5 is a central sectional perspective view of one of the two collaror mounting fiangesections according to Fig.3; f v

Fig. 6 is a sectional plan view of the spindle according to Fig. 3showing an improvedmanner of securing the bolster bearing assembly inplace in the bolster case; and I v Fig. 7 is a fragmentary planviewshowing a modified brake operating lever.

General construction In Fig. 1, showing the, simpler form of spindlehereof, a bolster case I0, preferably formed of seamless steel tubing,has an upper portion ll containing a bolster bearing assembly 12 and alower portion I4 containing a footstep bearing l5. Rotatably supportedby the bearings I2 and I5 is a spindle shaft or blade l6 comprising an'upper, bobbin-supporting and drive-connection portion l8 extendingthrough and upwardly from a driving whorl l9 and a coaxial lowerbearingengaging portion 20 extending downwardly from .the whorl and intothe footstep bearing I5. The

portion l8 has lower cylindrical portions 2| and 22 of two'differentdiameters, upon the larger diameter 2| of which the whorl is press orshrink fitted, and an upwardly tapered end portion received in acomplementary socket 23a of the bobbin or spool adapter 23 to bedescribed later. The lower portion 20 is tapered downwardly for itsentire length and has a conical tip 24 at its lower end within thefootstep.

Blade The blade [6 is preferably made in accordance with the disclosureof the application of Herbert Gleitz et 8.1., Serial No. 592,868, filedMay 9, l945. The same blade construction in one form is shown hereinparticularly by Figs. 1 and 2. The blade as shown comprises separateblade sections I81: and 20a, Fig. 2, having larger diameter cylindricalportions 2 la and 2 I b constituting the single cylindrical portion 2|in the finished blade. The sections can be made advantageously on anautomatic screw machine and later joined along the cut-off faces I811and 2011 to form the joint 25, Fig. 1, as by electrical resistance buttwelding.

Blade (continued) and adapter Although the blade l6 as shown in Fig. 1is shorter than those commonly used in the type of spindle illustrated,it is to be understood that the foregoing described construction may beused for blades of any length. Fig. 3 illustrates, in part, the type ofspindle construction employing a longer blade. The shortness of theblade it of Fig. 1 is enabled by the novel adapter 23 which in the typeof spindle shown is preferably joined to the blade or at least so fittedthereto as always to rotate therewith.

The adapter 23 which, for example, may enter and fit the central openingof a tubular fiber or paper thread bobbin (not shown) comprises aslightly tapered sleeve formed of aluminum or suitable aluminum alloy ormagnesium having the tapered axial socket 23a extending upwardly fromthe lower or larger end face to approximately the mid-portion of thesleeve. The socket 23a receives the tapered part of the upper portion[-8 of the blade l6, and the lower end face of the adapter ordinarilyrests on the upper face of the whorl IS. A tight fit between the adapterand the blade 1-6 is preferably accomplished by a shrink fit operationwhich may comprise first chilling the blade IE to reduce its diameter,in-

,serting; the blade into the socket 23a, and then lIn addition, thealuminum or light metal adapter weighs no more than the hard woodcurrently used and permits a positive driving fit to be made between theadapter and blade without the use of keys, pins or other fasteners.

Blade (cont nued) and whorl The whorl H! has a hub portion 28 (compareFigs. 1 and 3) fixed to the blade l6 as by a pressfitting upon thecylindrical portion 2| .of the blade. When the blade is made inaccordance with application Serial No. 592,868, advantage is taken ofthe press fitting between the blade and whorl to conceal the weld andassist in holding the two blade portions in alignment. The joint 25 asshown in Figs. 1 and 3 lies approximately centrally between theeffective ends of the hub.

A lower part 29 of the whorl surrounds the portion ll of the bolstercase (free therefrom), and may have an approximately cylindrical butbarrel-shaped surface 30 for engaging a driving belt or band (notshown). Below the surface 30, the whorl has an enlarged reinforcing andband supporting rim or flange portion 3|, the inner cylindrical face ofwhich, as shown only in Figs. 3 and 4, constitutes an internal brakingsurface 32 for cooperation with shoes of a brake mechanism describedbelow.

M oant'ing flange and brake The lower part of the portion ll of thebolster case [0 is received within aligned openings 36 in substantiallyidentical top and bottom sections 38a and 38b of a composite flange orcollar 38 which serves as a supporting means for the bolster case andmounts the brake mechanism and a whorl hook and band retainer 34. Theflange sections 38a and 38b are integrally joined together for exampleby spot welding (not shown) or by brazing (described later) with theircomplemental face surfaces 48 in face to face contact thus in effectforming an integral flange or spindle collar structure.

Each of the sections 38a and 38b is preferably formed by a blankingoperation from suitable plate or strip stock and has a body portion 4|(Figs. 3, 4, and 5) with curved or obtusely directed end faces 4|aextending to a lateral projection or tongue 42 and an opposing end face4|b which is curved as shown. The projection 42 in each instance has a.longitudinal slot 45 having parallel side walls, and a slot 46 formed inthe opposite edge portion of the body 4| has inwardly diverging sidewalls 46a. Also diametrically aligned with the opening 36 and havingparallel side walls which intersect the peripheral wall of the openingis a slot 41. The opening 36 and the slots 45, 46 and 41 may be formedby a punching operation e. g. simultaneously with blanking of the bodyfrom the strip, and a subsequent coining operation may provide at theface 48 a chamfered surface 36a around the peripheral edge of theopening 36 as well as oblique, chamfers 48 (one shown in Fig. 5) at theintersection of the walls 46a and the respective main faces 48 of eachsection.

Also formed in the surface 48 of each of the sections 3811 and 38b andpreferably by a coining or similar operation are alignedhemicylindrical, transverse grooves 49 intersecting the respective slots46 near their inner end walls. A similar pair of grooves 58 are formedin the face 46 of each section intersecting the slot 45 of the extensionarms 42. When the sections 38a and 38b are secured together, in a mannerto be described and as shown in Fig. 3, the complemental pairs ofgrooves 49 and 50 in the respective faces 48 define interrupted, andrespectively aligned cylindrical, transverse pinreceiving openings 52and 53. Additional recesses or grooves 5| (Fig. 5) may be coined orstamped in each section to form, after assembly of the sections, thecylindrical opening 54 (Figs. 3 and 4) radial with respect to thealigned bolster-case-receiving openings 36. The opening 54, however, israther large for such formation and usually is formed by drilling andcounterboring after assembly of the flange 38 onto the bolster case. Asindicated on Figs. 1 and 3, the chamfered surfaces 36a define an annularV- shaped groove 55 intermediate th outer ends of the aligned opening36, and the chamfered surfaces 48 define opposed V-shaped notches 56.Additionally, the sections 38a and 3812 are provided with punchedopenings 58a and 58b, respectively, which are located between therespective openings 36 and the slots 46 and which constitute the onlydifference between the two sections. The opening 58a as shown issomewhat larger than the opening 58b.

From the foregoing it is seen that the composite collar or mountingflange 38 is completely formed without recourse to costly andtimeconsuming machining and drilling operations. This is of particularimportance because the accurate drilling of an interrupted opening suchas the opening 52 is an extremely complicated operation requiringskillful machine operation and a costly fixture, and the forming of agroove such as the groove 55 in a one-piece flange or collar wouldobviously require an expensive boring operation after thbolster-case-receiving opening has been drilled.

In the case of the flange 38 of Fig. 1 the two sections 38a and 381) areexactly alike. The

threaded opening which receives the oiling fitting L and conductslubricant therefrom to the bolster case as illustrated in Fig. 1 ispreferably drilled and tapped after assembly of the flange on thebolster case but even that opening can be partly coined.

Although the preferred method of forming the sections 38a and 38b of theflange 38 is described herein as comprising stamping, punching, andcoining operations, it is to be understood that this invention extendsto the novelty of forming a spindle flange or collar in two separatesections and then joining them as by copper brazing into what is ineffect an integral structure; and is not to be limited to the use of theprecise manufacturing methods above described.

Brazing, as used herein The above references to brazing and. those givenbelow contemplate fusion of the joined metal parts together so thatthose parts become in effect integral. Such operation and functioncannot be accomplished by the silver solder methods described inapplication Serial No. 541,240, identified above. Silver solder alloysusually fuse at around 1300 F. or lower. Copper and copper brazingalloys fuse at 2100 F. and at higher temperatures at which molecularsurface changes are believed to occur on most steels such that actualfusion of the joined steel surfaces take place during the brazingoperation. A further difference is that solder of all types when used tojoin ferrous metals requires space in which to operate. Press fitted andshrink fitted generally smooth ferrous parts cannot be made more secureby soldering because the solder cannot penetrate the spaces actuallyleft between ferrous parts so fitted together whereas copper braze willpenetrate and fuse the parts. The brazing operations in accordanceherewith can be accomplished by heating the assembled parts byinduction, by immersion in a fused salt bath and in a controlledatmosphere furnace (substantially non-oxidizing atmosphere).

Whorl hook and mounting The whorl hook 34 (Figs. 1, 3 and 4) serves asa, temporary driving band support in two positions and comprises acylindrical spring wire bent into a U-shape. The upper or bight endportion 59, Figs. 3 and 4, of the hook is reversably bent upon theremainder of th wire (free therefrom) and intermediate portions of thelegs are offset in the same direction as the portion 59 by angularlydisposed portions 68. The extreme lower or free end portions 6| of theopposing legs are bent outwardly in axial alignment but in oppositedirections and are rotatably received respectively in the spacedportions of the interrupted cylindrical opening 52 defined by thecomplemental grooves 49 in the sections 38a and 38b. The hook 34 ispreferably mounted upon the flange 38 by forcing the leg portions of thehook toward each other and thus inserting the outwardly bent endportions 6| into respective portions of the opening 52 of the flange.Alternatively, the outwardly bent leg portions 6| can be placed in theinterrupted grooves 49 in one of the two flange sections 38a and 381)before bringing the sections together in face to face contact as abovedescribed and welded or otherwise secured into a right flange unit.

In order to disconnect the spindles from the driving band at times it isof advantage to be able to move the belt or band (not shown) away fromthe surface 30 and to retain it in its removed position. The hook 34 asshown may be rotated counterclockwise to an intermediate position shownby broken line 62 (Figs. 3 and 4), and to extreme lower position (notordinarily used) indicated, in Fig. 3, by the broken lines 64. Theinwardly diverging walls 46a releasably but strongly hold the hook 34 inthe normal operating position shown by solid lines in each of Figs. 1and 3. When the whorl hook is moved to the horizontal position 62, theopposing legs are bent inwardly toward each other by camming action ofthe walls 46a, and when the position 62 is reached the legs springoutwardly into the respective V-shaped notches defined by the chamferedsurfaces 48. Thus the hook does not have to be supported by the spindlerail, as usually is the case, in order to be retained in a horizontalposition.

Bolster case-further features As shown in Fig. l, the flange or collar38 is clamped against the top side of the usual fixed spindle rail R asby a suitable nut 65 and washer 66, the nut fitting threads 6'! formedon the portion l4 of the case. The brazed joint between the collar andcase is provided by inserting a wire or strip of brazing alloy (e. g.copper) in the annular groove 55 defined by the opposing chamfers 36a,sliding or pressing the collar 38 into position; heating the assembly aspreviously described, causing the brazing metal to flow throughout thespace between the collar and case as well as between the faces 40 of theflange sections 38a and 38b, and then cooling the assembly. The portionof the brazing alloy caused to flow between the faces 40 is sufficientto hold the sections 38a ad 38b integrally together in event they havenot been previously brazed or welded to join them into a self-sustainingsubassembly as may sometimes be practiced.

Attention is called to the fact that, in Fig. 1, there is no shoulder onthe upper non-threaded part of the bolster case against which thecomposite flange or collar 38 abuts. That surface can be and usually isthe original cylindrical unturned surface of the bar or tube stock fromwhich the bolster case is formed. The abutment shoulder in theconstruction according to Fig. 3 is mainly to definitely locate theoperating parts of the brake with reference to the position of the brakeshoes I (described later). Formation of the threads 61 in any case canbe reduced in cost by rolling instead of cutting or grinding.

Bolster bearing and staked-in retainer cap The bolster and footstepbearings l2 and I5, Fig. 1, may be of any suitable type but are shown tobe and preferably are very similar to those described and claimed in thepreviously identified patent and copending application. Considering thebolster bearing [2, the reduced lower end portion 22 of the blade I6extends for some distance downwardly from the whorl hub 28 and serves asthe inner race surface in respect to a set of rollers 68, Figs. 3 and 6,preferably bearing directly on the inner polished surface of a tubularmember 69 received in a counterbore of the bolster case I8. The member69 is clamped between a ring or collar H which is press-fitted into thecounterbore against the bottom thereof and a top cap '12 which ispressed or shrink fitted into the upper end portion of th counterbore.The lower end faces of the rollers 68 rest on the smooth upper surfaceof th collar H. A roller retaining and spacing cage 14 formed of acylindrically shaped (curled up) strip of sheet metal and havingroller-receiving, vertically disposed slots 15 defined by radiallyinwardly converging surfaces of the slots hold the rollers againstinward movement toward the axis of the bolster case when the spindleblade is removed.

The roller retainer or cage 14 freely occupies the space horizontallybetween the race forming inner wall surface of the member 69 and therace portion of the blade I6.

The upper end portion of the cage 14 is received loosely within acounterbore 19 of the top cap 12. The outer marginal area of the lowerend face of the top cap bears against the member 69 and the innermarginal area serves to limit upward travel of the rollers 68 to a veryslight movement To avoid expensive threading operations, to avoidapplication of heat incident to welding such, as might damage thebearing race surfaces or those of the rollers and to make the rollersetc. removable and replaceable for authorized service, the top cap issimply staked into place by a series of punch indentations 13, Figs. 3and 6, in the top of the bolster case. The indentations cause smallportions 13a of the bolster case metal to overhand and force against theouter rim portion of the top cap as will be clearly apparent, Thestaking indentations are done simultaneously by a suitable gang punchoperation in a press. When replacement of bearing parts becomesnecessary the portions 13a are cut away; and later the re-staking isdone in new positions around the rim of the bolster case. A completelyturned in flange such as previously proposed on bolster bearing retainercaps cannot be removed and replaced as a practical matter usuallybecause the turned in flange is destroyed in removing it.

Footstep bearing Referring to the footstep bearing l5, the body 8|thereof is appropriately bored and polished at 82 and 84 to receiverespectively the tapered portion and the conical tip end 24 of thespindle blade, the latter'and the tapered hole being in close runningfit at the lower part of the blade. The body 8| is held against turningby, for example, a diametrally extending slot 85 formed on its lowerface and loosely receiving a complementary cross tongue 81 formed on theupper face of a closure plug 86. The plug has an axial hole 89 in itsupper face providing a sludge sump, and the hole divides the tongue 81into two parts.

The plug 86 is high wear resisting metal, preferably Nitralloy or othermetal that will adequately resist damage when the bolster case and plugassembly is subject to the brazing temperature. The brazing metal oralloy, e. g. copper strip of wire is placed prior to assembly in anannular groove 9| formed in the peripheral surface of the plug close tothe lower end face of the bolster case. After the plug is properlypositioned, being limited during press or shrink fitting by a precisionformed mandrel temporarily placed inside the main bore of the bolstercase and shouldered against the bolster bearing support counterbore, thefootstep plug and bolster case are heated to fuse the brazing metalwhich flows between the bolster case and plug where it virtually fusesthe plug rigidly in position and fills any space which might enable oilleakage. .An annular groove 94 provided near the top of the plug 86effectively prevents the brazing metal from flowing to the cross slotswhich receive the projections 85.

The centering means for the footstep body 8| comprises a plurality ofradially guided buttons 95 biased outwardly by respective calibratedcoil springs 96, one of which is shown in non-stressed condition in Fig.1a. The spring 96, as shown, is of hour glass shape having small centralcoils 96a and gradually increased diameter coils 961) at both ends. Theadjacent coils 961) are so related to each other and two of the coils96a are so related to adjacent coils 961) that the coils nest orradially overlap whereby a considerable number of coils of fairly strongspring wire can be used in the rather small space allowed foraccommodating the spring. The enlargement of the coils at both ends ofthe spring assists greatly in preventing the spring from becoming skewedin position during assembly and in service.

Spindle brake (continued) The brake as shown in Figs. 3 and 4 comprisestwo identical arcuate shoe members I slidably received in a shallow,annular groove in the bolster case opposite the flange portion 3| of thewhorl I9. One pair of spaced, non-radial (inwardly converging) end facesIOI (Fig. 4) of the shoes I00 are slidably disposed on opposite sides ofa fixed cylindrical pin I02, and the other similar pair I04 of inwardlyconverging end faces are likewise disposed on opposite sides of areduced head portion I05 of a brake operator or pin I06 having aninwardly directed, hemi-cylindrical face surface I 08. The shoes I00 areformed of substantially rigid friction material. as in the abovementioned application, and are normally pressed inwardly intonon-braking position by a C-shaped spring wire I09 which lies in agroove I I0 formed in the outer peripheral surface of the shoes andextending around the entire periphery of the two shoes. The pin I02which is cut away at II I to provide clearance for the spring, and issecured as by a press fit into the opening 580. in the mounting flangesection 38a and rests on an annuar shoulder defined by the alignedopenings 58a and 58b which latter opening provides space for a tool suchas may be used to drive the pin I02 out in servicing the brake. Thelower body portion of the operator pin I06 is slidably received in thealigned slots 41 of the flange sections and has a threaded socket whichreceives a complementary, reduced threaded inner end portion of a pin II2. The pin I I2 is slidably received in the opening 54 and has an outerterminal flange I I4 between which and the inner transverse wall surfaceof the slots 41 a compression coil spring H5 is disposed. As shown, thespring surrounds the shank of the pin 2 and biases the pin outwardly toa released position of the brake. The pin I I2 is moved inwardly againstthe bias of the spring II5 by generally circular cam surfaces I I6 of agenerally channel-shaped manual lever II8 pivoted near its upper end ona pin I I9 received in the opening 53. Movement of the pin H2 inwardlymoves the pin I06 inwardly to force the end portions of the shoes I00which lie adjacent the end faces I04 outwardly against the brakingsurface 32, and, concurrently, the opposite ends of the shoes I00 areforced against the surface 32 with equal force as the end faces IOIslide on the pin I02.

The cam surfaces II6 as shown in Figs. 3 and 4 are formed on the edgesurfaces of side walls I of the lever H0 at the upper end portionthereof near the pivot, the lever II8 having a curved bight portion I2Iand having its side walls I20 below the cam surfaces curled inwardly asat I22. If desired a lever I24 partially shown in Fig. 7 may be usedinstead of the lever H8. The lever I24 is pivoted in the same manner asthe lever H8 and is also channel-shaped, but is in a relatively reversedposition and has the upper end part of its bight portion I25 curved todefine a cam surface I26 which functions as do the paired cam surfacesII6 on the head of the pin Positive releasing action of the brakeoperating mechanism is assured because the spring wire I09 need onlyexert sufiicient force to move the shoes I00 to brake-released position,the other moving parts of the brake mechanism being returned tobrake-released position by the spring II5.

Lubricator For lubrication of the spindle shown in Fig. 1, a sufiicientvolume of oil is preferably introduced into the bolster case as throughan oil gland or nipple L on the collar 38, previously referred to, sothat the portion of the blade above the footstep bearing is maintainedimmersed. As the oil level recedes, enough oil for lubrication of thebolster bearing climbs the slightly tapered portion of the blade portion20. Common practice is to introduce oil into a similar bolster case ofspindles not provided with brakes through a nipple on a case-supportingcollar. The improved oiling collar and mounting flange of Fig. 1 isconstructed in a manner similar to the flange 3B of Fig. 3 so as topermit the advantages and economics of coining operations to berealized. The sections 38a and 38b of Fig. 1 are essentially the same asthose of Fig. 3 except that no provision for supporting a brake is made.It will be apparent that the flange 38 of Fig. 3 can be provided with anoiler the same as is the corresponding flange of Fig. 1. The partiallythreaded opening I35 which align-s with and opens into a radial bore I36of the bolster case l0 to form an oil duct can, as previously stated, bepartially coined into the matching sections 38a and 38b although it isnot believed practical to coin the threads in that manner.

Reference is directed to the following co-pending applications claimingsubject matter originally disclosed by this case: Herbert Gleitz et al.,Serial No. 638,944, filed January 4, 1946, entitled Method of makingtextile spindle elements; Herbert Gleitz et al., Serial No. 647,721,filed February 15, 1946, entitled Spindles for textile mill use; andHerbert Gleitz et al., Serial No. 647,722, filed February 15, 1946,entitled Spindle-s for textile mill use.

We claim:

1. In a mounting flange construction for a textile mill spindle, a pairof substantially identical flange sections, each having a centralopening and a substantially planar face surface, complemental cavitieson said face surfaces, respectively, and means securing said sectionstogether with said face surfaces in face to face contact and saidcavities in complemental relation.

2. In a flange construction for a textile mill spindle, a pair ofsubstantially identical flange sections, each having a central openingand a substantially planar face surface, chamfers formed about theperiphery of said openings at said face surfaces, respectively, andmeans securing said sections together with said face surfaces in face toface contact and said openings in axial alignment, whereby said chamfersdefine a groove about the peripheral wall of said aligned openings.

3. A flange construction in accordance with 11 claim 2 characterized inthat said chamfers are die formed depressed in said face surfaces,respectively.

4. In combination, a bolster case adapted to be turned from metal barstock, and a mounting flange for the bolster case having an openingtightly fitting the bolster case and fused to the case by relativelyhigh melting point brazing metal..

5. In a textile mill spindle, a pair of substantially identical flangesections having respective face surfaces in face to face engagement,bolster case-receiving, aligned openings in said sections, alignedjslotsin said sections, respectively, complemental grooves in said facesurfaces, respectively, transverse to and intersecting said slots,respectively, said aligned slots being adapted to receive and support abrake-operating lever, and said complemental grooves being adapted toreceive and support a pivot for such lever.

6. In a textile mill spindle, a bolster case having a mounting flangeand bearings for ablade, a blade having a whorl, said blade and whorlbeing removably carried by the bearings, a slot extending into one edgeof the flange and having side walls diverging inwardly from said edgetoward the bolster axis, aligned openings intersecting the side walls ofthe slot, a whorl hook of spring material with shank portion pivotallyengaging said aligned openings-respectively, and recesses in said sidewalls positioned for spring engagement with shank portions of the hookwhen the hook is in a generally horizontal position.

7. A bolster case for a textile mill spindle comprising a central hollowmetal body adaptedto support a spindle blade for rotation and abodysupporting flange comprising a pair of sheet metal stampings withmutually registering apertures arranged to receive said body, meansrigidly joining the two stampings together in face to face relationship,and means joining the resulting flange unit to the body adjacent theapertures.

8. A bolster case for a textile mill spindle assembly, said casecomprising a central hollow metal body adapted to support a spindleblade for rotation, and a body-supporting flange comprising separatelaminated metal sections apertured to receive the body, said portionsbeing intimately joined together by fused metal and attached to the bodyby fused metal at the wall surfaces which define the apertures.

9. A bolster case for a textile mill spindle assembly, said casecomprising a central tubular metal body adapted to support a spindleblade for rotation, a body-supporting flange comprising laminated metalsections with registering apertures to receive the bolster case,intimately joined together in face to face relationship and secured tosaid body adjacent the apertures, the joined faces of the sectionshaving mutually registering depressions therein which together functionto provide a receiving bore or socket'parallel to the principal plane ofthe flange for carrying a part ancillary to the spindle assembly.

HERBERT GLEITZ. PAULJ. THYREEN. CHARLES E. MILLER.

REFERENCES CITED The' following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 135,189 Wilson Jan. 21, 18731,966,677 Naylor July 17, 1934 2,351,951 Gleitz June 20, 1944 1,452,673Adkinson Apr. 24, 1923 1,425,521 Glennon et al Aug. 15, 1922 2,230,652Nelson Feb. 4, 1941 2,295,111 Hemmings Sept. 8, 1942 2,157,918 RankinMay 9, 1939 2,241,118 Cotchett May 6, 1941 2,168,248 Staufert Aug. 1,1939 2,168,249 Staufert Aug. 1, 1939 2,320,565 Cabot June 1, 19432,245,423 Winslow June 10, 1941 FOREIGN PATENTS Number Country Date458,746 German Apr. 20, 1928 329,166 German Nov. 15, 1920 23,988 SwissMay 30, 1901 6,387 British 1892

